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3 years ago

Someone help me quickly plzzz

Mathematics

2 answers:

natali 33 [55]3 years ago

8 0

Where’s the question

Black_prince [1.1K]3 years ago

4 0

Answer:

what is the question I don't see it

You might be interested in

Does the system have one solution,no solution,or infinitly many? Use substitution to justify your answer

Bad White [126]

Answer:

(0,3) One solution

Step-by-step explanation:

Step: Solve x+5y=15for x:

x+5y=15

x+5y+−5y=15+−5y(Add -5y to both sides)

x=−5y+15

Step: Substitute −5y+15for x in 7x+2y=6:

7x+2y=6

7(−5y+15)+2y=6

−33y+105=6(Simplify both sides of the equation)

−33y+105+−105=6+−105(Add -105 to both sides)

−33y=−99

−33y

−33

−99

−33

(Divide both sides by -33)

y=3

Step: Substitute 3 for y in x=−5y+15:

x=−5y+15

x=(−5)(3)+15

x=0(Simplify both sides of the equation)

Therefore (0,3) which is one solution

3 0

3 years ago

Is this a function or not a function (2,5), (4, -2), (3,3), (5,4), (-2,5)

Lena [83]

Answer:

Yes, it is a function

Step-by-step explanation:

A function is where there is no two of the same domain.

The domain is the first coordinate.

Hope This Helps :)

4 0

3 years ago

Read 2 more answers

What is 6.02 x 10-5 written in standard form?

Alinara [238K]

Answer:

55.2

Step-by-step explanation:

8 0

3 years ago

Hey answer this those who know?

Makovka662 [10]

Answer:

do like this i think answer is correct

8 0

3 years ago

Your teacher is giving a test worth 250 points. There are 68 questions. Some questions are worth 5 points and the rest are worth

NARA [144]

There are 38 five point questions and 30 two points questions.

Step-by-step explanation:

Given,

Worth of points in test = 250

Number of questions = 68

Let,

x represent the number of 5 points questions

y represent the number of 2 points question

According to given statement;

x+y=68 Eqn 1

5x+2y=250 Eqn 2

Multiplying Eqn 1 by 2

$2(x+y=68)\\2x+2y=136\ \ \ Eqn\ 3$

Subtracting Eqn 3 from Eqn 2

$(5x+2y)-(2x+2y)=250-136\\5x+2y-2x-2y=114\\3x=114$

Dividing both sides by 3

$\frac{3x}{3}=\frac{114}{3}\\x=38$

Putting x=38 in Eqn 1

$38+y=68\\y=68-38\\y=30$

There are 38 five point questions and 30 two points questions.

Keywords: linear equation, elimination method

Learn more about elimination method at:

#LearnwithBrainly

8 0

3 years ago